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Paper IPM / Physic / 7737  


Abstract:  
We study semiclassical string solutions on the 1/2 BPS geometry of type IIB string theory characterized by concentric rings on the boundary plane. We consider both folded rotating strings carrying nonzero Rcharge and circular pulsating strings. We find that unlike rotating strings, as far as circular pulsating strings are concerned, the dynamics remains qualitatively unchanged when the concentric rings replace AdS_5 S^5. Using the gravity dual we have also studied the Wilson loop of the corresponding gauge theory. The result is qualitatively the same as that in AdS_5 S^5 in the global coordinates where the corresponding gauge theory is defined on S^3 R. We show that there is a correction to 1/L leading order behavior of the potential between external objects.
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